Dirty Kanza and ENVE Composites invite you to get out and ride one of these Challenge routes to earn a chance at winning an ENVE wheelset. We’ve partnered with some great shops and riders to offer some incredible routes in gravel destinations across the country. To view the Challenges, hit the "Challenges" tab below. To be entered to win in you must hit "Join" on the Challenge route of your choice, complete the route and save your Ride Story on blackriver before the end of October. After “Joining” the event, you can either track your ride with the blackriver app or upload the file from a GPS device to your blackriver account. More detailed instructions can be found on the individual Challenge pages.